Newest Apple Watch amps up health features with heartbeat upgrade

The Apple Watch Series 3 is more health-focused than ever, coming packaged with an improved heart rate monitor, and an interesting but mysterious medical study.

Apple COO Jeff Williams unveiled the device Tuesday at the iPhone Event, along with a new watchOS and workout app.

The heart monitor will monitor a slew of new metrics, including resting heart rate and recovery heart rate after exercise. (You want a lower resting rate, and a higher recovery rate).

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Your Series 3 will also alert you when your resting heart rate is elevated while you don't appear to be active. The new feature is "inspired by a lot of the letters we receive from customers who notice an unusually high heart rate when they wouldn't expect one," according to Williams. "Most people won't notice." Read more...